Solve the System Using Gaussian Elimination $( x , y )$

question 6

Multiple Choice

Solve the system using Gaussian elimination. If $( x , y )$ is the solution to the system, give the value of $2 x - y$ .
$$\left\{ \begin{array} { c } x + y = 23 \\x - 2 y = - 13\end{array} \right.$$

• A) \(\quad 10\)
• B) 13
• C) \(\quad 7\)
• D) \(\quad 8\)
• E) \(\quad 9\)

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